Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca8213ebcf13072…

MALICIOUS

PDF

84.2 KB Created: 2021-03-19 03:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 90329fb358b05669b21dedd9235c0f0b SHA-1: ee8f156093a8bc48d528967cd4ff41336d61bbe4 SHA-256: cca8213ebcf1307299aad28d1112e7fdbacd912706be8a7b3974d4dbcbb43325
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by heuristics as an external URI and flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to reference a book title, suggesting a lure to trick users into clicking the malicious link. The presence of multiple unknown reputation URLs further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/award?keyword=linux+administration+handbook+5th+edition+pdf PDF link annotation
    • http://lefenup.22web.org/android_cardview_vs_materialcardview.pdfIn PDF document text
    • http://lopixerirerenex.mywebcommunity.org/business_environment_for_mcom.pdfIn PDF document text
    • http://wopexobow.mywebcommunity.org/qu_es_y_para_qu_nos_ayuda_la_planeacin_financiera.pdfIn PDF document text
    • http://rewirujekinoxex.iblogger.org/41678560872.pdfIn PDF document text
    • http://podcard2020.site/html_and_css_editor_downloadco0xj.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/vujupujufofefolis.pdfIn PDF document text
    • http://requiredjokblog.com/minecraft_astral_sorcery_constellations8fyia.pdfIn PDF document text
    • http://bilkan.fun/kekorto71w.pdfIn PDF document text
    • http://tinubovibiwiwi.iblogger.org/tekekisozufaxibi.pdfIn PDF document text
    • http://duzixofiwisegi.mygamesonline.org/texas_instruments_ti-83_plus_graphing_calculator_batteries.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fifomi/loadrunner_scripting_interview_questions_and_answers.pdfIn PDF document text
    • http://jikogajaw.rf.gd/plantronics_backbeat_go_810_wireless_headphones_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/radogiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/1367864353.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/35697615077.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/chrome_setup_for_windows_8_free.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/vopikuduzedor.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/is_kewpie_mayo_low_fodmap.pdfIn PDF document text
    • http://sebokegekesuded.atwebpages.com/13419067388.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/91666316316.pdfIn PDF document text
    • http://bulujulu.rf.gd/95139509286.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFC 5468 bytes
SHA-256: 45ebb8fa72edd0e2f680aafc0cb8f29e1630a6456593654b83e0333e582dc6a0
font_01_sfnt_off00010f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F68 11288 bytes
SHA-256: 3fb1c72d904745408b0a82f12c1176adbd5b7b0c9b7e3d7cf4e7dcff58a4f21f
font_02_sfnt_off000134f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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